Process for extracting tin from iron-containing tin products.



HEINRICH BRANDENBURG, OF. KEMPEN-ON-THE-RHINE, GERMANY.

PROCESS FOR EXTRACTING TIN FROM IRON-CONTAINING TIN PRODUCTS,

To all whom it may co'rwerm Be it known that I, HEINRrcn BRANDENBURG,chemist, a subject of the King of Prussia, residing at 29 Moorenring,Kempen-on-t he-Rhine, in the German Empire, have invented a new anduseful Process for Extracting Tin from Iron-Containing Tin Products,

such as Residues and the Like; and I do'hereby declare the following tobe a full, clear, and exact description of the same. I

This invention relates to a process for separating the iron and tincontained in the intermediate products of the treatment of tin ore, thatis to say, in wasteproducts,

residues, tin-containing slag, ashes, scraps, soot and the like. p

According to this invention the said 'waste products are smelted withsilicate of tin, which is either specially prepared for the purpose, orobtained from the slags particularly raw tin containing large quantitiesof iron,

' are melted with isilicate of tin or with a slag containing a silicateof tin, the reaction takes place in such manner that the tin of thewaste products treated, and the tin Specification of Letters Patent. I IApplication illod October 26,1906. Serial No. 340,449.

Patented July 9, 1907.

contained in the slag or in the silicate in combination with'the silica,appears in metallic state, while the iron is combined with the silica.Any oxid or dioxid of tin that may be mechanically dissolved in theslag, reacts in a similar manner. In this way, tin free from iron isobtained, partly consisting of the tin of the raw material, and partlyof the tin of the specially produced silicate of tin, or of the oxid ordioxid of tin dissolved in the slag.

Having described my invention, what I claim as new,

and desire to secure by Letters Patent of the United States is: I

1. The process for extracting tin from iron-containing tin productsobtained during the treatment of tin ore, consisting in meltingsuch'iron-contsining tin products with silicate of tin.

2. The process for extracting tin from iron-containing i :in productsobtained durin g'the treatment of tin ore, conproduced during theextraction of i by Old processes j sisting in meltingsuch'iron-containing tin products 'with the smelting taking placepreferably in the presence of a slag containing'one or more compoiindsof tin and oxygen. such as tin oxid, tin dioxid, silicate of tin, andthe like. t

. In witness whereof I have hereunto set my hand in the presence of twowitnesses.

HEINRICH BRANDENBURG. Witnesses:

Aoeusr Wnrnsnn,

